There are tons of picture worthy spots in FL. Not sure which way you are coming but even on the ride between Davenport there are some good spots.
That said avoid I-4 through Orlando. take the toll road 417 around the outside, will save you alot of time as I-4 can be a parking lot on most days.
Downtown Lakeland (nearby Davenport) has some nice photo ops around the Lake.
Historic Kissimmee (if you use US 17) offers some older buildings for a back drop.
As mentioned Merrit Island has alot of good spots
Anywhere along the Banana river on the east side for sunset shots.
Not really any oceanfront places in Cocoa for shots I can think of
County and state parks will also offer lots of good backdrops.
Best advice would be avoid the interstate like highways and take state and US highways as they offer more places to pull off for shots and less traveled so less traffic.
pm me if you want specific info on good roads, I have extensive experience on the road less traveled in FL